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Yftisite-(Y) Mineral Data

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General Yftisite-(Y) Information

Help on Chemical  Formula: Chemical Formula: (Y,Dy,Er)4(Ti,Sn)O(SiO4)2(F,OH)6
Help on Composition: Composition: Molecular Weight = 753.13 gm
   Dysprosium   6.47 %  Dy    7.43 % Dy2O3
   Yttrium     41.32 %  Y    52.47 % Y2O3
   Erbium       4.44 %  Er    5.08 % Er2O3
   Titanium     4.77 %  Ti    7.95 % TiO2
   Silicon      7.46 %  Si   15.96 % SiO2
   Tin          3.94 %  Sn    5.00 % SnO2
   Hydrogen     0.27 %  H     2.39 % H2O
   Oxygen      21.24 %  O
   Fluorine    10.09 %  F    10.09 % F
                 -   %   F    -4.25 % -O=F2    
              ______        ______ 
              100.00 %      102.12 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y3.5Dy0.3Er0.2Ti0.75Sn0.25(SiO4)2F4(OH)2
Help on Environment: Environment: Silicified alkalic granite near a gabbro-anothosite contact. Approved 1965, discredited 1987 as incompletly characterized.
Help on IMA Status: IMA Status: Discredited IMA 1987 - Approved IMA 1965
Help on Locality: Locality: Kazakhstan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1965 for the elemental makeup, (Y, F, Ti, Si).
Help on Name Pronunciation: Name Pronunciation: Yftisite-(Y) Say YFTISITE-(Y)
Help on Synonym: Synonym: Discredited IMA 1997
  ICSD 20003
  PDF 33-1462
 

Yftisite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.4068:1:0.6628
Help on Cell Dimensions: Cell Dimensions: a = 14.949, b = 10.626, c = 7.043, Z = 4; V = 1,118.77 Den(Calc)= 4.47
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: C mcm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.766(1), 2.667(1), 3.099(1),
 

Physical Properties of Yftisite-(Y)

Help on Cleavage: Cleavage: None
Help on Color: Color: Yellow.
Help on Density: Density: 3.96
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luster: Luster: Vitreous - Greasy
 

Optical Properties of Yftisite-(Y)

Help on Optical Data: Optical Data: Biaxial (-), a=1.69, b=1.705, g=1.711, bire=0.0210, 2V(Calc)=64, 2V(Meas)=large. Dispersion r > v distinct.
Help on Pleochroism (x): Pleochroism (x): anomalous blue.
Help on Pleochroism (y): Pleochroism (y): anomalous blue.
Help on Pleochroism (z): Pleochroism (z): anomalous blue.
 

Calculated Properties of Yftisite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.09 gm/cc
note: Specific Gravity of Yftisite-(Y) =4.47 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEYftisite-(Y) = 155.92 barns/electron
U=PEYftisite-(Y) x relectron= 638.33 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 10,663.23 (Gamma Ray American Petroleum Institute Units)
Concentration of Yftisite-(Y) per GRapi unit = 93.78 (PPM)

Yftisite-(Y) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Yftisite-(Y) - weak
Specimen
Size
Weight/Volume
(Sphere)
*
Calculated
Activity
Bequerols
(Bq)
Calculated
Activity
Curies (Ci)
Estimated
Activity
GR(api)
Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 7.53 cm 244,488 6.61E-06 10,663.23 3.51
100 gm / 3.50 cm 24,449 6.61E-07 1,066.32 0.35
10 gm / 1.62 cm 2,445 6.61E-08 106.63 0.04
1 gm / 7.53 mm 244 6.61E-09 10.66 0.00
0.1 gm / 3.50 mm 24 6.61E-10 1.07 0.00
0.01 gm / 1.62 mm 2 6.61E-11 0.11 0.00
0.001 gm / 0.75 mm 0 6.61E-12 0.01 0.00

Weight of pure Yftisite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.47 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 0.55 % Th) From Sum REE Elements (10.91 % REE)
 

Yftisite-(Y) Classification

Help on  Dana Class: Dana Class: 52.04.04.03 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.04)with cations in [6] and/or > [6] coordination
  (52.04.04)Natisite - Yftisite group
 
52.04.04.01 Natisite Na2(TiO)SiO4 P 4/nmm 4/m 2/m 2/m
 
52.04.04.02 Paranatisite Na2[TiO(SiO4)] P mc21 mm2
 
52.04.04.03 Yftisite-(Y)? (Y,Dy,Er)4(Ti,Sn)O(SiO4)2(F,OH)6 C mcm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.AG.25 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AG -Nesosilicates with additional anions; cations in > [6] � [6] coordination
 
09.AG.25 Yftisite-(Y)? (Y,Dy,Er)4(Ti,Sn)O(SiO4)2(F,OH)6 C mcm 2/m 2/m 2/m
 
09.AG.25 Trimounsite-(Y) (Y,REE)2Ti2SiO9 P 21/c 2/m
 

Other Yftisite-(Y) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Yftisite-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Print or Cut-and-Paste your Yftisite-(Y) Specimen Label here :

Yftisite-(Y)

(Y,Dy,Er)4(Ti,Sn)O(SiO4)2(F,OH)6
Dana No: 52.04.04.03 Strunz No: 09.AG.25
Locality:

 

Notes:

 

 
   
 


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